I have a 1978 puch maxi and the engine is siezed all to hell. I took off head and then turned the flywheel. The middle piece moved with the piston. It is alittle rusty. The moped hasn't ran in about 8 years. Any ideas on getting it unstuck. I went to the auto store and got this stuff called sea salt Deep Creep. It says it will unsieze engines but after a day and a half of it soaking i still can get it to come off.